#ifndef BOOST_MPL_NEGATE_HPP_INCLUDED | |
#define BOOST_MPL_NEGATE_HPP_INCLUDED | |
// Copyright Aleksey Gurtovoy 2000-2004 | |
// | |
// Distributed under the Boost Software License, Version 1.0. | |
// (See accompanying file LICENSE_1_0.txt or copy at | |
// http://www.boost.org/LICENSE_1_0.txt) | |
// | |
// See http://www.boost.org/libs/mpl for documentation. | |
// $Id: negate.hpp 49267 2008-10-11 06:19:02Z agurtovoy $ | |
// $Date: 2008-10-11 02:19:02 -0400 (Sat, 11 Oct 2008) $ | |
// $Revision: 49267 $ | |
#include <boost/mpl/integral_c.hpp> | |
#include <boost/mpl/aux_/msvc_eti_base.hpp> | |
#include <boost/mpl/aux_/na_spec.hpp> | |
#include <boost/mpl/aux_/lambda_support.hpp> | |
#include <boost/mpl/aux_/config/eti.hpp> | |
#include <boost/mpl/aux_/config/integral.hpp> | |
#include <boost/mpl/aux_/config/static_constant.hpp> | |
namespace boost { namespace mpl { | |
template< typename Tag > struct negate_impl; | |
template< typename T > struct negate_tag | |
{ | |
typedef typename T::tag type; | |
}; | |
template< | |
typename BOOST_MPL_AUX_NA_PARAM(N) | |
> | |
struct negate | |
#if !defined(BOOST_MPL_CFG_MSVC_ETI_BUG) | |
: negate_impl< | |
typename negate_tag<N>::type | |
>::template apply<N>::type | |
#else | |
: aux::msvc_eti_base< typename apply_wrap1< | |
negate_impl< typename negate_tag<N>::type > | |
, N | |
>::type >::type | |
#endif | |
{ | |
BOOST_MPL_AUX_LAMBDA_SUPPORT(1, negate, (N)) | |
}; | |
BOOST_MPL_AUX_NA_SPEC(1, negate) | |
#if defined(BOOST_MPL_CFG_NO_NESTED_VALUE_ARITHMETIC) | |
namespace aux { | |
template< typename T, T n > struct negate_wknd | |
{ | |
BOOST_STATIC_CONSTANT(T, value = -n); | |
typedef integral_c<T,value> type; | |
}; | |
} | |
#endif | |
template<> | |
struct negate_impl<integral_c_tag> | |
{ | |
#if defined(BOOST_MPL_CFG_NO_NESTED_VALUE_ARITHMETIC) | |
template< typename N > struct apply | |
: aux::negate_wknd< typename N::value_type, N::value > | |
#else | |
template< typename N > struct apply | |
: integral_c< typename N::value_type, (-N::value) > | |
#endif | |
{ | |
}; | |
}; | |
}} | |
#endif // BOOST_MPL_NEGATE_HPP_INCLUDED |